Adjustable press wheel scraper

ABSTRACT

An adjustable scraper structure is attached to a press wheel arm and suspends an adjustable scraper above the press wheel for removing mud buildup above the treads on the tire. The scraper is rotatably adjustable about the rotational axis of the press wheel and the blade pitch is rotatably adjustable about an axis parallel to and removed from the press wheel axis. The pitch or tilt of the scraper blade may be radially aligned with the blade extending perpendicular to a wheel periphery tangent line or the press wheel scraper blade may be inclined somewhat in either direction

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to agricultural planters and, more particularly, to a scraper for removing buildup from a planter row unit press wheel.

2. Description of the Related Art

A basic planter has a tractor towed array of row units, each for forming a crop row. The planting process for each row unit includes opening a furrow, depositing seed in that furrow, and closing the furrow. Frequently, there is an additional rearmost assembly on each row unit for pressing or compacting the soil about the seed, for example, with a press wheel, to insure good contact and moisture retention. When a planter is in a soft/muddy field the press wheel tends to buildup with mud causing problems with closing the trench and seed placement. Planting time is wasted if the operator needs to interrupt a planting operation and clean the wheels.

The present invention provides a simplistic yet versatile adjustable soil pressing wheel scraper for removing soil that is moist enough to adhere to the press wheel. A fixed scraper bracket where the scraper is only adjustable along one axis (farther and closer to press wheel) has been suggested. Such an arrangement only determines the proximity to the wheel tread at which the scraper removes the mud. Scrapers which may be variously positioned about the press wheel periphery have also been suggested. Locating the scraper high near the top of the press wheel results in a more widespread dispersion of the removed mud than does a location closer to the ground.

What is needed in the art is a press wheel scraper which may be optimally located and oriented for specific soil conditions.

SUMMARY OF THE INVENTION

The present invention provides a press wheel scraper that is both rotatably and pitch adjustable.

The invention in one form is directed to an agricultural planter row unit with a furrow closing structure located rearward of furrow opening and seed depositing arrangements for moving soil into a furrow to cover the deposited seeds. A soil compacting assembly is located rearward of the furrow closing structure and includes a press wheel support arm extending toward the rear of the row unit with a press wheel having an axle fixed to the support arm. An elongated scraper arm is pivotably fastened near one support arm end for rotation about the press wheel axis of rotation and a scraper blade bracket is pivotably fastened near the other scraper arm end for rotation about an axis displaced from and generally parallel to the press wheel axis of rotation. A scraper blade is fixed to the scraper blade bracket for removing mud from the press wheel periphery. One fastening mechanism secures the scraper arm at a preferred angular orientation relative to the press wheel and another fastening mechanism secures the scraper blade bracket at a preferred angular orientation relative to the scraper arm.

The invention in another form is directed to an adjustment arrangement for determining the angular location and orientation of a scraper relative to the outer periphery of a press wheel. The scraper arm is pivotably supported near one end on the press wheel axle and a fastener fixes the angular position of the scraper arm about the press wheel axis at a selected position. The scraper blade is pivotably attached to the scraper arm near the other scraper arm end for limited rotation relative to the scraper arm and a second fastener for fixes the angular orientation of the scraper blade relative to the scraper arm.

The invention in a further form is directed to an adjustable support assembly for an agricultural planter row unit press wheel scraper. There is a press wheel support arm extending toward the rear of the row unit with a press wheel having an axle fixed to the support arm. The axle determines the press wheel axis of rotation. An elongated scraper arm with scraper blade fixed thereon is pivotably fastened near one scraper arm end for rotation about the press wheel axis of rotation and a scraper blade bracket pivotably fastened near the other scraper arm end for rotation about an axis displaced from and generally parallel to the press wheel axis of rotation. A first fastening mechanism secures the scraper arm at a preferred angular orientation relative to the press wheel, and a second fastening mechanism for secures the scraper blade bracket at a preferred angular orientation relative to the scraper arm.

An advantage of the present invention is pitch or tilt of the scraper blade may be radially aligned (with the blade extending perpendicular to a wheel periphery tangent line) or with the press wheel scraper blade inclined somewhat in either direction

Another advantage is it allows planter to get in the field earlier and stay in longer.

BRIEF DESCRIPTION OF THE DRAWINGS

The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of an embodiment of the invention taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is an isometric view of a furrow closing and press wheel assembly forming the rearward portion of a planter row unit according to the present invention; and

FIG. 2 is an isometric view of the scraper blade and bracket of FIG. 1 showing the surfaces not visible in FIG. 1.

Corresponding reference characters indicate corresponding parts throughout the several views. The exemplification set out herein illustrates one embodiment of the invention in one form, and such exemplification is not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION OF THE INVENTION

Referring now to the drawings, and more particularly to FIG. 1, there is shown a rearward portion of a planter row unit 10 which generally includes a furrow opening arrangement, a seed depositing mechanism (not shown), and a furrow closing arrangement here shown as a pair of discs 12 and 14. The direction of forward motion of the row unit 10 is indicated by arrow 16. Extending rearward of the furrow closing discs 12 and 14 is a press wheel support arm 18 and near the rearward end thereof a press wheel 20 having an axle 22 extending through apertures (not visible) along an axis of rotation 24.

An elongated scraper arm 26 including arm members 28 and 30 spans the press wheel 20. The scraper arm is pivotably attached to the wheel axle 22 for rotation about the axle axis 24, for example by bolt head 32. This rotation allows the scraper blade to be moved about the press wheel periphery while remaining at a constant distance therefrom. A fastening mechanism for securing the scraper arm 26 at a preferred angular orientation relative to the press wheel 20 may take the form of three apertures 34 and 36 equidistant from the axle receiving aperture and corresponding axis 24. A fastening member such as a bolt and nut assembly 38 passes through and obscures the third aperture. Arm member 28 is provided with a similar set of equidistant apertures. Thus, the scraper arm may be angularly adjusted by rotating clockwise or counterclockwise from the position illustrated simply by removing the nut and bolt assemblies from the center apertures and reinserting them in one of apertures such as 34 or 36.

In FIG. 2, bolt head 32 no longer obscures the axle 22 receiving apertures 40 and 42. The angular orientation securing arrangement of the apertures 44 and 46 equidistant from the axle receiving aperture 40 and corresponding axis 24 for the arm member 28 is now visible as is the corresponding bolt and nut assembly 48.

A scraper blade bracket 50 has the scraper blade 52 fixed thereto by a pair of nut and bold assemblies 54 and 56. The scraper blade bracket 50 is a generally U-shaped member having a pair of arms 58 and 60 extending from an intermediate region 62. Each arm has an aperture for receiving a mounting bolt 64 or 66 which are axially aligned with the blade pitch pivot axis 68, and one arcuate shaped opening 70 or 72. Locking bolts 74 and 76 pass through the arcuate shaped openings and limit the pivotal motion of the blade bracket to the angular extent of the arcuate openings. A firm tightening of the mounting bolts will tend to lock the pitch of the blade 52, however, tightening the locking bolts is much more secure.

Two somewhat different techniques for fixing the angular relationship between two members have been disclosed. In one, an off-axis aperture in one member is aligned with any selected one of several apertures in the other, and a pin or bolt passed through the aligned openings. In the other, an off-axis aperture in one member is aligned with an arcuate opening in the other and a bolt passed through the aligned openings to clamp the members together. One technique provides a discrete number of possible angular relationships while the other allows a continuous range of possible angular relationships throughout the angular extent of the arcuate opening. Either technique may be employed in lieu of the other and either could be employed for determining the proximity of the blade to the press wheel surface.

While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims. 

What is claimed is:
 1. An adjustable support assembly for an agricultural planter row unit press wheel scraper, comprising; a press wheel support arm extending toward the rear of the row unit; a press wheel having an axle fixed to the support arm and determining the press wheel axis of rotation; an elongated scraper arm pivotably fastened near one scraper arm end for rotation about the press wheel axis of rotation; a scraper blade bracket pivotably fastened near another scraper arm end for rotation about an axis displaced from and generally parallel to the press wheel axis of rotation; a scraper blade fixed to the scraper blade bracket for removing mud from the press wheel periphery; a first fastening mechanism for securing the scraper arm at a preferred angular orientation relative to the press wheel; and a second fastening mechanism for securing the scraper blade bracket at a preferred angular orientation relative to the scraper arm.
 2. The adjustable support assembly of claim 1 wherein the scraper arm comprises a pair of elongated arm members, one to each side of the press wheel, each having a wheel axle receiving aperture near said one end and an angular location fixing opening spaced from the wheel axle receiving aperture, the first fastening mechanism comprising a pair members each passing through a corresponding angular location fixing opening and into the press wheel support arm.
 3. The adjustable support assembly of claim 1 wherein the scraper arm comprises a pair of elongated arm members, one to each side of the press wheel, each elongated arm member having a wheel axle receiving aperture near said one end; and the first fastening mechanism comprises a set of apertures in each elongated arm member, each of the set of apertures being equidistant from the corresponding axle receiving aperture, and a corresponding single aperture in the press wheel arm, whereby, the scraper arm may be rotated about the wheel axle and the single press wheel arm aperture brought into alignment with any selected one of the set of elongated arm apertures.
 4. The adjustment arrangement of claim 1, wherein the scraper arm comprises a pair of elongated arm members spanning the press wheel, each scraper arm member having an aperture near said another scraper arm end, and a member passing through the aperture for pivotably supporting the scraper blade bracket.
 5. The adjustment arrangement of claim 1, wherein the second fastening mechanism fixes the inclination of the scraper blade relative to the press wheel surface and comprises an elongated arcuate shaped opening in one of the scraper blade bracket and scraper arm and a corresponding alignable aperture in the other of the scraper blade bracket and scraper arm, and a bolt passing through the arcuate shaped opening and aligned aperture.
 6. An adjustment arrangement for determining the angular location and orientation of a scraper relative to the outer periphery of a press wheel, comprising: a scraper arm pivotably supported near one end on the press wheel axle for limited rotation about the press wheel axle axis; a first fastener for fixing the angular position of the scraper arm about the press wheel axis at a selected position; a scraper blade pivotably attached to the scraper arm near the other scraper arm end for limited rotation relative to the scraper arm; and a second fastener for fixing the angular orientation of the scraper blade relative to the scraper arm.
 7. The adjustment arrangement of claim 6 wherein the scraper arm comprises a pair of elongated arm members spanning the press wheel, each having a wheel axle receiving aperture near said one end and an angular location fixing opening spaced from the wheel axle receiving aperture, the first fastener comprising a pair members each passing through a corresponding angular location fixing opening.
 8. The adjustment arrangement of claim 7, wherein the second fastener includes a scraper blade bracket pivotably attached to the arm members by a pair of bolts each passing through alignable apertures in the bracket and a corresponding scraper arm member; and angularly fixed by a second pair of bolts each passing through a second aperture in one of the bracket and corresponding arm member, and an elongated arcuate shaped opening in the other of the bracket and corresponding arm member.
 9. The adjustment arrangement of claim 8 wherein the scraper blade bracket comprises a generally U-shaped member having a pair of arms extending from an intermediate region, each arm having one said alignable aperture and one said arcuate shaped opening.
 10. The adjustment arrangement of claim 9 wherein the intermediate region fixedly supports the scraper blade.
 11. An agricultural planter row unit, comprising: a furrow closing arrangement located rearward of furrow opening and seed depositing arrangements for moving soil into a furrow to cover the deposited seeds; and a soil compacting assembly located rearward of the furrow closing arrangement, including: a press wheel support arm extending toward the rear of the row unit; a press wheel having an axle fixed to the support arm and determining the press wheel axis of rotation; an elongated scraper arm pivotably fastened near one support arm end for rotation about the press wheel axis of rotation; a scraper blade bracket pivotably fastened near another scraper arm end for rotation about an axis displaced from and generally parallel to the press wheel axis of rotation; a scraper blade fixed to the scraper blade bracket for removing mud from the press wheel periphery; a first fastening mechanism for securing the scraper arm at a preferred angular orientation relative to the press wheel; and a second fastening mechanism for securing the scraper blade bracket at a preferred angular orientation relative to the scraper arm.
 12. The row unit of claim 11, wherein the scraper arm comprises a pair of elongated arm members each having a wheel axle receiving aperture near said one end and an angular location fixing opening spaced from the wheel axle receiving aperture, the first fastening mechanism for securing the angular position of the scraper arm about the press wheel axis at a selected position comprising a pair members passing through the angular location fixing opening and into the press wheel support arm.
 13. The row unit of claim 12 wherein the angular location fixing opening comprises a set of apertures equidistant from the axle receiving aperture, and a corresponding single aperture in the press wheel arm selectively alignable with any one of the set of apertures.
 14. The row unit of claim 12, wherein the second fastening mechanism comprises a single aperture in each elongated arm member, a pair of elongated openings in the scraper bracket, and a pair of members each passing through an arm member aperture and an elongated opening. 